Quickly hack up implementation of turn indicators.

With an LED strip length of 10, arrange the leds clockwise from 1 to 10
starting with led 1 at the north west (10:30hrs) with led 5 north east
(01:30hrs), led 6 south east and led 10 south west.

When armed or not, moving the roll stick to the left will make the leds
on the left flash, and same for right and also for pitch forwards and
backwards too.
Update turn indicators and battery led flashing to operate
independently.

Turn indicators now flash faster the more you're turning.